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Biomedical subjects

F Streiff

Publications and source records attributed to F Streiff.

At least 109 records · Page 6Linked to original sources
PubMed1975

[Study of the osmotic behaviour of human platelets].

Observation of the behaviour of platelets in hypotonic media affords an approach to the evaluation of their fragility. It should be possible to apply such a test to various fields such as the study of rheological properties of platelets, the investigation of certain pathological cases and eventual alterations during storage. The curve obtained reflects a continuous distribution of platelet osmotic fragility.

Blood Platelets↗
PubMed1975

[Capillary blood coagulation in the healthy premature newborn].

Blood coagulation of healthy premature newborns, since birth, was studied for 45 days by a method of capillary blood sampling in a plastic tube. The most often measured clotting factors allowed to establish control coagulation times for the tests performed in premature sick infants. In this study, the clotting factors were identical in at-term and premature children. Vitamin-K dependent factors showed the most important deficits; however, at birth their levels seemed higher in at-term newborns. They reached control values after one month, with a progressive evolution. The other blood-clotting factors were normal.

Blood Coagulation Tests↗
PubMed1975

[An invariant of plasma viscosity].

Determination of "m" invariant cannot lead to an absolute measurement of plasmatic viscosity, because "m" increases with temperature. It allows however to compare data determined in various conditions.

Blood Viscosity↗
PubMed1975

[Physicochemical study of platelet aggregation by 3 polylysines].

The action of polylysines of various molecular weight on platelet behaviour is studied with the help of 3 techniques: photometric test, screen filtration pressure on PRP and electrophoretic mobility. Polylysines, which are polybasic substances, produce a platelet aggregation studied by photometry after a short period of latency. Aggregation, depending on the doses of poly-lysine and chiefly on the optic density, shows a "plateau" with the dose of 100 gamma/ml for poly-lysine L, of molecular weight 17000. The screen filtration pressure increases continuously in the presence of the polylysines studies. Finally, the platelet charge decreases. The results depend on the concentration of poly-lysine, and the optimal concentration which involves the more marked alterations is inversely proportional to the molecular weight of the polylysine studied.

Blood Platelets↗